Sailly



' (No Model L. J. DESAILLY & J. FRAISSE.

SAFETY HOOK FOR STABLE-S.

Patented Aug. 13,1895.

F/G l 3g INVENTORJ ATTORNEYJ WITNESSES: I

NITED STATES PATENT GFF CE.

LOUIS JOSEPH DESAILLY, OF BOULOGNE-SUR-SEINF, AND JULESFRAISSE, OF

PARIS, ASSIGNORS TO EMILE ARTHUR THOUAR, OF BAIVES, FRANCE.

SAFETY-HOOK FOR STABLES.

SPECIFICATION forming part of Letters Patent No. 544,568, dated August 13,1895.

Application filed April 22. 1895. Serial No. 546,708. (No model.) Patented in France February 11, 1895, No. 232,167.

Louis Joseph Desail1y,) of which the following is a specification.

Our improved swinging safety hook is mainly designed to prevent accidents from horses riding over the partitions in stables provided with movable partitions by enabling the attendant to easily cause the partition to drop to the ground as a horse is riding over it and enabling the horse to free itself by its own weight, the hook coming open automaticaliy under a certain pressure. WVe attain these objects by the apparatus illustrated in the accompanying drawings, in which- Figure l is an outside view of the safetyhook. Fig. 2 is an outside view at right angles to Fig. 1 and partly in section. Fig. 3is a sectional plan on the line 3 3, Fig. 2; and Fig. 4 shows the elastic disks detached.

The body of the device consists of a cylinder A, closed at the bottom, except as hereinafter described, and'closed at the top by a headpiece C, which may be detachably secured by a cross-pin c, and to which is connected the suspension cord or rope X.

B is a swinging hook, pivoted at g to the head D of a bolt E, and having its long arm adapted to engage with a hook-ended catch F, open at one side, Fig. 3, on the exterior of the cylinder A. The bolt E passes up through the bottom of and into the cylinder A, and has fitting freely around it a set of reverselyarranged tempered-steel cups R, confined between the bottom of the'cylinder A and an adjustable nut H on the upper threaded end of the bolt. These cupsR constitute a spring to normally sustain the bolt with its hook in engagement with the catch F. Z is the chain which is held by the hook B and which it is desirable to release at times and which in the construction contemplated is intended to support the movable partition.

G is a ring pivoted to the head of the bolt and having connected to it a running chain Y to limit the fall of the partition.

The partition being supported bymeans of a rope or a chain, the apparatus is placed at about mans height, being fastened at its upper end to the supporting rope or chain X and at its lower end to another chain Z, attach'ed to the partition.

In order to unfasten the hook by hand the apparatus should be clasped in the hand and squeezed in order to free the lever of the book from the hooked end of the catch F. Then a 6 partial turn is given to the cylinder or boltin order to completely free the lever from the catch F. The hook then swings open, as indicated by dotted lines at B, Fig. 2, the chain supporting the partition comes unhooked, and 7c the partition falls to the ground.

The automatic unfastening is effected bya pressure or longitudinal pull determined by the strength of the spring and varying according to how it is regulated. The effect is the same as when unfastened by hand, with the only differencethat instead of being freed sidewise the lever of the hook B comes out underneath the catch F as it follows the downward movement of the bolt.

The cups R composing the spring give way under a pressure which can be regulated by increasing or decreasing the number of the cups, considering that the greater the number of cups composing the spring the more sensitive this becomes, and the lesser this number the stronger the pressure must be to produce a downward action and consequently the unfastening of the hook.

We claim as our invention- '1. The herein described safety hook, comprising a body portion and a bolt therein carrying a swinging hook with an arm, the bolt and body portion being capable of rotation with reference to each other, a catch on the 5 body, open at one side, and a spring aotingon the bolt to normally engage the said arm of I a spring acting on the body to normally en- 10 the swinging hook with the catch, substangage the said arm of the swinging hook with tially as set forth. the catch, substantially as set forth. 2. The herein described safety hook, coln- Paris, the 5th day of April, 1895. 5 prising a body portion and a bolt therein car- LOUIS JOSEPH DESAILLY.

rying a swinging hook with an arm, the bolt JULES FRAISSE. and body portion being capable of rotation lVitnesses: with reference to each other, a hook-ended DONALD HARPER,

catch on the body, open at the hook end, and 1 ARNAUD DE FORARD. 

